When will i find out what I'm having??

Jennifer • Mother of 4. A 10 year old 🙍🏾, my 👼🏽is watching over us, my 👧🏽👧🏽 🌈babies & 🤰🏽with our last 👧🏽
I go to my 13 week ultrasound on the 6th of jan and wondering if they will be able to tell what I'm having? My obgyn thinks they'll be able to tell. I'm currently 12w+3 days and I'm having twins